Method for production of containers in thermoplastic material, i

Details Method for production of containers in thermoplastic material, i Method for production of containers in thermoplastic material, i

1989-06-15

1990-07-24

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264521, 264549, 264554, 425384, 425388, B29C 5104, B29C 5142

Patent

active

049434063

ABSTRACT:
Method for the production of heat resistant polyethyleneterephthalate containers by means of thermoforming with a longitudinal and radial direction stretching of a sheet (1) of unstretched amorphous polymer in a die (2) kept at a temperature of about 175.degree.-180.degree. C. The container is consolidated and extracted by a counterdie (4), cooled and provided with suction means. The containers thus are stable at sterilization temperature in boiling water and in steam at 130.degree. C.

REFERENCES:
patent: 4511322 (1985-04-01), Jakobsen et al.
patent: 4564495 (1986-01-01), Nilsson et al.
patent: 4582665 (1986-04-01), Jabarin
patent: 4701121 (1987-10-01), Jakobsen et al.
patent: 4704243 (1987-11-01), Nilsson et al.
patent: 4711624 (1987-12-01), Watson

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